Once the tallest building in the world and the site of “the highest dinner ever held in New York” this building now holds the most expensive penthouse in the city.

Eat the ultimate iteration of Portugal's most beloved pastry.

Ancient human remains unearthed around the iconic monument.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

The remnants of an abandoned, 19th-century gold mill along Aruba's rugged northeastern coast.

The mouldering manses of wealthy colonials still pock the streets of a Curaçao neighborhood.

A rare, flower-shaped example of Brutalist architecture in Switzerland.

The oldest family-run restaurant in the United States is a living museum of New Orleans dining history.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

These pretty kitties killed and ate as many as 135 railway workers.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

The childhood home of the Wright Brothers in Dayton.

The world's first aircraft factory has been hiding inside an automobile plant for almost 80 years.

An abandoned munitions factory with a shot tower continues to wage war on the surrounding environment.

A castle built by an eccentric medieval enthusiast in suburban Ohio.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

The final resting place for the remains of 143 Habsburg royalty.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

This poignant tribute to the White Rose movement showcases artifacts related to the heroic anti-Nazi struggle.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

This staircase in a lush tropical grotto was built by enslaved laborers and renamed to honor Queen Victoria's role in ending slavery in the British Empire.

The larger of two volcanic peaks rising out of the crystalline waters of the Caribbean.